Great Plains Earless Lizard

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Great Plains Earless Lizard - Holbrookia maculata maculata Abundance: Unknown Status: NSSU NatureServe: G5TNR S2 Population Status: Restricted distribution, population numbers and threats are unknown. Limiting Factor: Habitat: limited habitat. Species found in southeastern Wyoming in sandy areas. Degree of habitat loss is unknown. Comment: None. Introduction The Great Plains Earless Lizard may be found in Goshen and Laramie Counties. This lizard is commonly active from April to October. However, juveniles and hatchlings are more active in the fall than adults (Hammerson 1999). When temperatures exceed preferred conditions, this species will retreat into vegetation or burrows. Breeding begins in April. Adult females will deposit 3-6 eggs in June or July. Large females can lay 2 clutches per year (Hammerson 1999). Hatchlings commonly begin to appear in August. The Great Plains Earless Lizard primarily feeds upon insects and other small invertebrates. Habitat In Wyoming, the Great Plains Earless Lizard inhabits grassland communities in the plains zone (Baxter and Stone 1985). Within these habitats, this lizard prefers yucca and exposed sandy habitats. This species may also be found along streams, prairie-dog towns, and other flat open expanses of ground (Hammerson 1999). Problems h Lack of basic information on the species presence, distribution, and ecology in Wyoming. h This species may have limited habitat in Wyoming and degree of this habitat loss is unknown. Conservation Actions h Develop management recommendations based on resulting data. h Survey and monitor population distribution, status, and habitat assocations. Monitoring/Research Conduct baseline surveys to gain better understanding of species distribution within the state. Recent Developments Baseline reptile and amphibian surveys were conducted in southeast Wyoming in 2011 and 2012 (Snoberger and Walker 2013, 2014). Several Great Plains Earless Lizards were documented during these surveys and detailed habitat data was collected at these locations (Snoberger and Walker 2013, 2014). Reptiles have received increased attention within Wyoming. Incidental observations are encouraged to be reported to the herpetology program. References Hammerson, G.A. 1999. Amphibians and Reptiles in Colorado: A Colorado Field Guide, Second Edition. University Press of Colorado and Colorado Division of Wildlife. 484 pp. Baxter, G.T. and M.D. Stone. 1985. Amphibians and Reptiles of Wyoming. Second Edition. Wyoming Game and Fish Department, Cheyenne. 137pp. Snoberger, C.E. and Z.J. Walker. 2013. Southeast Wyoming reptile and amphibian surveys 2011-2012. Wyoming Game and Fish Department Administrative Report. Cheyenne, Wyoming. Snoberger, C.E. and Z.J. Walker. 2014. Reptile and amphibian habitat associations in southeast Wyoming. Wyoming Game and Fish Department Administrative Report. Cheyenne, Wyoming. 2017.

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Spot-Tailed Earless Lizard Update: January 2017
Spot-Tailed Earless Lizard Update: January 2017 Travis LaDuc Roel Lopez UT Austin Texas A&M Brad Wolaver Wade Ryberg UT Austin Texas A&M Mike Duran Toby Hibbitts The Nature Conservancy Texas A&M Ben Labay Matt Fujita UT Austin UT Arlington Jon Paul Pierre Corey Roelke UT Austin UT Arlington Ian Wright UT Austin Gautam Surya UT Austin Cody Shank UT Austin Photo by Mike Duran Thursday, January 26, 2017 Goals and Agenda Update of scien7ﬁc progress since Sept. 2016 Discussion of ongoing research Findings So Far 1. Field data update for 2016 2. Insect survey update 3. Gene7cs status 4. Habitat modeling 1. Status 2. Road bias 3. Ground-truthing + possible addi7onal research… Study Area 2015 Surveys • April 22 – Sept 24 • 274 surveys in 57 counes • 18 coun7es with posive H. lacerata surveys • 174 H. lacerata observed 2016 Surveys • April 6 – Sept 28 • 171 surveys in 28 counes • 53 surveys in 7 coun7es with posive H. lacerata surveys • 170 H. lacerata observed • 91 animals marked; 2 recaptures 2016 Surveys • 171 surveys (April 6 – August 26) • 52 walking; 18 lizards seen (0.04 lizards/hr) • 119 driving; 152 lizards seen (0.30 lizards/hr) • 28 counes across historical range • Areas of 2015 sigh7ngs • Historical range where no 2015 sigh7ngs • 170 Holbrookia lacerata sighted • No new coun7es with H. lacerata from 2015 (save Suon Co.) • Juveniles observed in every unit 2016 Surveys • Mark-recapture: • 91 individuals iden7ﬁed (all photographed, 61 toe-clipped) • Two recaptures • Combinaon road and walking surveys Diet / Insect Surveys Diet data obtained
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